Loudoun County Flag

Loudoun County

State:
Virginia
County Seat:
Leesburg

Loudoun County's estimated 2025 population is 443,457 with a growth rate of 0.81% in the past year according to the most recent United States census data. Loudoun County is the 4th largest county in Virginia. The 2010 population was 315,486 and has seen a growth of 40.56% since that time.

443,457
Total Population
859
Population Density (mi²)
4
Population Rank (State)
3.6K 0.81%
Annual Population Growth

Loudoun County Population

Demographics

Economics and Income Statistics